Current File : /home/vacivi36/vittasync.vacivitta.com.br/vittasync/node/test/common/prof.js
'use strict';
const assert = require('assert');
const fs = require('fs');
const path = require('path');
function getHeapProfiles(dir) {
const list = fs.readdirSync(dir);
return list
.filter((file) => file.endsWith('.heapprofile'))
.map((file) => path.join(dir, file));
}
function findFirstFrameInNode(root, func) {
const first = root.children.find(
(child) => child.callFrame.functionName === func,
);
if (first) {
return first;
}
for (const child of root.children) {
const first = findFirstFrameInNode(child, func);
if (first) {
return first;
}
}
return undefined;
}
function findFirstFrame(file, func) {
const data = fs.readFileSync(file, 'utf8');
const profile = JSON.parse(data);
const first = findFirstFrameInNode(profile.head, func);
return { frame: first, roots: profile.head.children };
}
function verifyFrames(output, file, func) {
const { frame, roots } = findFirstFrame(file, func);
if (!frame) {
// Show native debug output and the profile for debugging.
console.log(output.stderr.toString());
console.log(roots);
}
assert.notStrictEqual(frame, undefined);
}
// We need to set --heap-prof-interval to a small enough value to make
// sure we can find our workload in the samples, so we need to set
// TEST_ALLOCATION > kHeapProfInterval.
const kHeapProfInterval = 128;
const TEST_ALLOCATION = kHeapProfInterval * 2;
const env = {
...process.env,
TEST_ALLOCATION,
NODE_DEBUG_NATIVE: 'INSPECTOR_PROFILER',
};
// TODO(joyeecheung): share the fixutres with v8 coverage tests
module.exports = {
getHeapProfiles,
verifyFrames,
findFirstFrame,
kHeapProfInterval,
TEST_ALLOCATION,
env,
};
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